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    Kerberos Squid without authentication?

    Scheduled Pinned Locked Moved Cache/Proxy
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    • M
      mcury @killmasta93
      last edited by mcury

      @killmasta93 Is the ticket being generated?
      If the client is a domain member, and everything is configured correctly, the HTTP ticket will appear in klist..

      Check and confirm if the path to the proxy inside Internet Explorer (Windows proxy configuration), is set correctly.

      Are you using Samba and DNS backend ?
      If so there are some tests you can do, check the Kerberos part in the link below, also perform the DNS tests to confirm if everything is set up as it should be.

      https://wiki.samba.org/index.php/Setting_up_Samba_as_an_Active_Directory_Domain_Controller

      dead on arrival, nowhere to be found.

      K 1 Reply Last reply Reply Quote 0
      • K
        killmasta93 @mcury
        last edited by

        @mcury

        Thanks for the reply, as the proxy this is how i have it configured
        626c4e7a-d589-43d3-af92-70d39dbff1e7-image.png

        when i open chrome and then check the klist i get the ticket

        C:\Users\administrador.CASA>klist

El id. de inicio de sesión actual es 0:0xb410d

Vales almacenados en caché: (2)

#0>     Cliente: administrador @ CASA.LOCAL
        Servidor: krbtgt/CASA.LOCAL @ CASA.LOCAL
        Tipo de cifrado de vale Kerberos: RSADSI RC4-HMAC(NT)
        Marcas de vale 0x40e00000 -> forwardable renewable initial pre_authent
        Hora de inicio: 5/8/2021 16:21:07 (local)
        Hora de finalización:   5/9/2021 2:21:07 (local)
        Hora de renovación: 5/15/2021 16:21:07 (local)
        Tipo de clave de sesión: RSADSI RC4-HMAC(NT)
        Marcas de caché: 0x1 -> PRIMARY
        KDC llamado: apolo.casa.local

#1>     Cliente: administrador @ CASA.LOCAL
        Servidor: LDAP/apolo.casa.local/casa.local @ CASA.LOCAL
        Tipo de cifrado de vale Kerberos: RSADSI RC4-HMAC(NT)
        Marcas de vale 0x40ac0000 -> forwardable renewable pre_authent ok_as_del
egate 0x80000
        Hora de inicio: 5/8/2021 16:21:07 (local)
        Hora de finalización:   5/9/2021 2:21:07 (local)
        Hora de renovación: 5/15/2021 16:21:07 (local)
        Tipo de clave de sesión: RSADSI RC4-HMAC(NT)
        Marcas de caché: 0
        KDC llamado: apolo.casa.local

        But not sure what else im doing wrong, currently running zentyal as my domain controller

        Thank you

        Tutorials:

        https://www.mediafire.com/folder/v329emaz1e9ih/Tutorials

        M 1 Reply Last reply Reply Quote 0
        • M
          mcury @killmasta93
          last edited by

          @killmasta93 Dirección, you set the IP, told you to use the hostname and not the IP.
          Change that 192.168.3.254 and use the proxy hostname, hostname.casa.local

          dead on arrival, nowhere to be found.

          K 1 Reply Last reply Reply Quote 0
          • K
            killmasta93 @mcury
            last edited by

            @mcury
            thanks for the reply so i changed to hostname but still get the popup

            76ca37e5-c84e-459b-9230-1505e87c098e-image.png

            i also checked if the get the ticket

            im not sure if the above steps when configuring squid i did it correctly which i think might be the problem?

            aaaab9e1-d75a-4718-84ad-0a96e44eb770-image.png

            Tutorials:

            https://www.mediafire.com/folder/v329emaz1e9ih/Tutorials

            M 1 Reply Last reply Reply Quote 0
            • M
              mcury @killmasta93
              last edited by

              Check if your pfsense can perform the following command successfully.

              kninit administrator

              If it works, update here and we follow from that.

              dead on arrival, nowhere to be found.

              K 1 Reply Last reply Reply Quote 0
              • K
                killmasta93 @mcury
                last edited by

                @mcury
                Thanks for the reply this is what i get

                [2.4.5-RELEASE][root@Olympus.casa.local]/root: kinit administrador
administrador@CASA.LOCAL's Password: 
[2.4.5-RELEASE][root@Olympus.casa.local]/root: klist
Credentials cache: FILE:/tmp/krb5cc_0
        Principal: administrador@CASA.LOCAL

  Issued                Expires               Principal
May  9 20:09:35 2021  May 10 06:09:35 2021  krbtgt/CASA.LOCAL@CASA.LOCAL

                Tutorials:

                https://www.mediafire.com/folder/v329emaz1e9ih/Tutorials

                M 1 Reply Last reply Reply Quote 0
                • M
                  mcury @killmasta93
                  last edited by mcury

                  Now check if your pfsense can perform these commands:
                  Assuming that olympus is the hostname of the AD DNS server and the domain is casa.local

                  host -t SRV _ldap._tcp.casa.local.
host -t SRV _kerberos._udp.casa.local.
host -t A olympus.casa.local.

                  I would remove these lines from krb5.conf to test:
                  You will need to generate a new keytab after changing these settings

                  default_tgs_enctypes = aes128-cts-hmac-sha1-96
default_tkt_enctypes = aes128-cts-hmac-sha1-96
permitted_enctypes = aes128-cts-hmac-sha1-96

                  dead on arrival, nowhere to be found.

                  K 1 Reply Last reply Reply Quote 0
                  • K
                    killmasta93 @mcury
                    last edited by

                    @mcury said in Kerberos Squid without authentication?:

                    host -t A olympus.casa.local.

                    Thanks for the reply, as for the AD DNS the server is called apolo which has an ip of 192.168.3.150 and olympus is the pfsense with IP 192.168.3.254

                    i ran the following commands without removing the lines and seemed to worked

                    [2.4.5-RELEASE][root@Olympus.casa.local]/root: host -t SRV _ldap._tcp.casa.local.
_ldap._tcp.casa.local has SRV record 0 100 389 apolo.casa.local.
[2.4.5-RELEASE][root@Olympus.casa.local]/root: host -t SRV _kerberos._udp.casa.local.
_kerberos._udp.casa.local has SRV record 100 100 88 apolo.casa.local.
_kerberos._udp.casa.local has SRV record 0 100 88 apolo.casa.local.
[2.4.5-RELEASE][root@Olympus.casa.local]/root: host -t A apolo.casa.local.
apolo.casa.local has address 192.168.3.150

                    Tutorials:

                    https://www.mediafire.com/folder/v329emaz1e9ih/Tutorials

                    M 1 Reply Last reply Reply Quote 0
                    • M
                      mcury @killmasta93
                      last edited by

                      @killmasta93 said in Kerberos Squid without authentication?:

                      [2.4.5-RELEASE][root@Olympus.casa.local]/root: host -t SRV _kerberos._udp.casa.local.
                      _kerberos._udp.casa.local has SRV record 100 100 88 apolo.casa.local.
                      _kerberos._udp.casa.local has SRV record 0 100 88 apolo.casa.local.

                      I would remove the following lines from krb5.conf to test:
                      You will need to generate a new keytab after that, then replace the keytab in pfsense, and logout and login again with the client to test.

                      Following lines to remove will use the default enctypes.
                      default_tgs_enctypes = aes128-cts-hmac-sha1-96
                      default_tkt_enctypes = aes128-cts-hmac-sha1-96
                      permitted_enctypes = aes128-cts-hmac-sha1-96

                      dead on arrival, nowhere to be found.

                      K 1 Reply Last reply Reply Quote 0
                      • K
                        killmasta93 @mcury
                        last edited by

                        @mcury
                        Thanks for the reply, so did the following deleted the following lines and recreated the keytab but same issue

                        1e13ead3-f8da-481e-bc43-4c9b1dc26d83-image.png

                        993a40a7-81b3-4982-a5d0-3b8cf8bee96b-image.png

                        7b88e87e-2a79-45b4-bbd4-3962f014576d-image.png

                        Tutorials:

                        https://www.mediafire.com/folder/v329emaz1e9ih/Tutorials

                        M 1 Reply Last reply Reply Quote 0
                        • M
                          mcury @killmasta93
                          last edited by

                          auth_param negotiate program /usr/local/libexec/squid/negotiate_kerberos_auth -d -k /usr/local/etc/squid/squidkeytab.keytab
                          auth_param negotiate children 1000
                          auth_param negotiate keep_alive on
                          acl auth proxy_auth REQUIRED
                          http_access deny auth
                          http_access allow auth

                          name is squidkeytab.keytab and not squidproxy.keytabb ?

                          dead on arrival, nowhere to be found.

                          K 1 Reply Last reply Reply Quote 0
                          • K
                            killmasta93 @mcury
                            last edited by

                            @mcury
                            Thanks for the reply, just realized that it was an error but after changing same issue

                            c94d8927-3857-4fc6-85b0-4ef09f37aabd-image.png

                            Tutorials:

                            https://www.mediafire.com/folder/v329emaz1e9ih/Tutorials

                            M 1 Reply Last reply Reply Quote 0
                            • M
                              mcury @killmasta93
                              last edited by

                              df438830-1f39-49e6-a13d-748436058fb2-image.png
                              This is the ticket that should appear in klist..

                              Everything seems to be OK with your configuration, at least between pfsense and AD.

                              Show squid logs again after changing the keytab.
                              Can you test with another client?

                              dead on arrival, nowhere to be found.

                              K 1 Reply Last reply Reply Quote 0
                              • K
                                killmasta93 @mcury
                                last edited by

                                @mcury
                                Thanks again for the reply, so im trying another machine which is in the domain but same issue

                                aed2b95d-d81f-417c-b591-85de356c47f9-image.png

                                32bd5b2a-74ea-4215-ab8b-4c65081e31db-image.png

                                Tutorials:

                                https://www.mediafire.com/folder/v329emaz1e9ih/Tutorials

                                M 1 Reply Last reply Reply Quote 0
                                • M
                                  mcury @killmasta93
                                  last edited by

                                  Did you create the user and enabled it in AD ?

                                  8cbf2dcb-d511-4859-a23d-79155901eca4-image.png

                                  dead on arrival, nowhere to be found.

                                  K 1 Reply Last reply Reply Quote 0
                                  • K
                                    killmasta93 @mcury
                                    last edited by

                                    @mcury
                                    Thanks for the reply, correct already did that
                                    on the Service principal name

                                    f9688ac1-9018-4ebd-8b50-23e2c29f4c76-image.png

                                    Tutorials:

                                    https://www.mediafire.com/folder/v329emaz1e9ih/Tutorials

                                    M 1 Reply Last reply Reply Quote 0
                                    • M
                                      mcury @killmasta93
                                      last edited by mcury

                                      Maybe you are facing the same problem as this guy was, take a look:

                                      http://squid-web-proxy-cache.1019090.n4.nabble.com/squid-kerb-auth-received-type-1-NTLM-token-td2131613.html

                                      Quote:
                                      You should see a request from the client to Active Directory asking for a TGS for HTTP/<fqdn of proxy>. If that does not happen or get refused by AD the client will fall back to NTLM (wrapped into the Negotiate response) which is waht you see on the proxy.

                                      I would set a packet capture like that guy did to check, port 88

                                      dead on arrival, nowhere to be found.

                                      K 1 Reply Last reply Reply Quote 0
                                      • K
                                        killmasta93 @mcury
                                        last edited by

                                        @mcury
                                        Finally got it to authenticate but im still getting the popup

                                        525feae3-d657-4d22-b5de-aa1e3611b3fd-image.png

                                        Tutorials:

                                        https://www.mediafire.com/folder/v329emaz1e9ih/Tutorials

                                        M 1 Reply Last reply Reply Quote 0
                                        • M
                                          mcury @killmasta93
                                          last edited by mcury

                                          Why are you authenticating as administrador@CASA.LOCAL ?
                                          The user should be appearing there and not administrator. Should be user@CASA.LOCAL

                                          The user need to be member of the group used in ldapusersearch in Squidguard

                                          dead on arrival, nowhere to be found.

                                          K 1 Reply Last reply Reply Quote 0
                                          • K
                                            killmasta93 @mcury
                                            last edited by killmasta93

                                            @mcury
                                            its because im opening the chrome inside of the windows server which im logged on as administrador

                                            this is another user

                                            68db97a0-6e2f-4ab8-b790-b01fded9a4c1-image.png

                                            Tutorials:

                                            https://www.mediafire.com/folder/v329emaz1e9ih/Tutorials

                                            M 1 Reply Last reply Reply Quote 0
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